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Transverse structure of pitch fiber from coal tar mesophase pitch

โœ Scribed by T. Hamada; T. Nishida; M. Furuyama; T. Tomioka

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
480 KB
Volume
26
Category
Article
ISSN
0008-6223

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โœฆ Synopsis

The transverse structure of pitch fiber has been successfully controlled by changing the pitch flow conditions at the upper portion of the capillary in spinning. The mean size of mesophase domains in the transverse section of pitch rod extruded from the capillary was found to decrease monotonously with decreasing rod diameter and with increasing pitch viscosity. Also, the stirring of molten pitch located just above the capillary gave rise to a decrease of the mesophase domain size. It has been revealed that the graphitizability of the pitch fiber depends mainly on the mean domain size in the transverse section, as long as the degree of preferred orientation is the same.

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